Function update_class

IPython/extensions/autoreload.py:380–419

Replace stuff in the __dict__ of a class, and upgrade method code objects, and add new methods, if any

(old, new)

def update_class(old, new):
    """Replace stuff in the __dict__ of a class, and upgrade
    method code objects, and add new methods, if any"""
    for key in list(old.__dict__.keys()):
        old_obj = getattr(old, key)
        try:
            new_obj = getattr(new, key)
            # explicitly checking that comparison returns True to handle
            # cases where `==` doesn't return a boolean.
            if (old_obj == new_obj) is True:
                continue
        except AttributeError:
            # obsolete attribute: remove it
            try:
                delattr(old, key)
            except (AttributeError, TypeError):
                pass
            continue
        except ValueError:
            # can't compare nested structures containing
            # numpy arrays using `==`
            pass

        if update_generic(old_obj, new_obj):
            continue

        try:
            setattr(old, key, getattr(new, key))
        except (AttributeError, TypeError):
            pass  # skip non-writable attributes

    for key in list(new.__dict__.keys()):
        if key not in list(old.__dict__.keys()):
            try:
                setattr(old, key, getattr(new, key))
            except (AttributeError, TypeError):
                pass  # skip non-writable attributes

    # update all instances of class
    update_instances(old, new)


def update_property(old, new):